#SaturdaySurprise : Justin Bieber Bulges in his Calvin Klein Underwear Ad

Justin Bieber in his Calvin Klein underwear ad, bulge and all...Definitely think that this is photoshopped but the hell I care! :) @goseegeo #SaturdaySurprise

* See Justin Bieber's hot gif after break...

Peen-alert!!!

Celebs in their Undies: Choi Siwon

And here's the proof that this is Siwon...

Celebs in their Undies: Zayn Malik V.2

Last time, we just saw the Polo Ralph Lauren Undies from a back view, now here's his total glory..

GIF courtesy of Poison Paradise

Celebs in their Undies: Colton Haynes

Celebs in their Undies: Tyler Posey

Photo Courtesy of Celebrity Undies

Celebs in their Undies: Zayn Malik

Photo Courtesy of Celebrity Undies

Celebs in their Undies: Taylor Lautner